Invariance properties of random curves: an approach based on integral geometry
@article{Mazzolo2020InvariancePO, title={Invariance properties of random curves: an approach based on integral geometry}, author={Alain Mazzolo}, journal={arXiv: Mathematical Physics}, year={2020} }
Traveled lengths statistic is a key quantity for characterizing stochastic processes in bounded domains. For straight lines and diffusive random walks, the average length of the trajectories through the domain is independent of the random walk characteristics and depends only on the ratio of the volume domain over its surface, a behavior that has been recently observed experimentally for exponential jump processes. In this article, based solely on geometrical concepts, we extend this remarkable…
One Citation
Mean arc theorem for exploring domains with randomly distributed arbitrary closed trajectories
- MathematicsThe European Physical Journal Plus
- 2022
A remarkable result from integral geometry is Cauchy’s formula, which relates the mean path length of ballistic trajectories randomly crossing a convex 2D domain, to the ratio between the region area…
References
SHOWING 1-10 OF 39 REFERENCES
An invariance property of diffusive random walks
- Mathematics
- 2003
Starting from a simple animal-biology example, a general, somewhat counter-intuitive property of diffusion random walks is presented. It is shown that for any (non-homogeneous) purely diffusing…
Mean arc theorem for exploring domains with randomly distributed arbitrary closed trajectories
- MathematicsThe European Physical Journal Plus
- 2022
A remarkable result from integral geometry is Cauchy’s formula, which relates the mean path length of ballistic trajectories randomly crossing a convex 2D domain, to the ratio between the region area…
Invariance property of wave scattering through disordered media
- MathematicsProceedings of the National Academy of Sciences
- 2014
It is demonstrated that an equivalent invariance relation also holds for the scattering of waves in resonant structures as well as in ballistic, chaotic or in Anderson localized systems.
Properties of chord length distributions of nonconvex bodies
- Mathematics
- 2003
Cauchy’s formula which relates the mean chord length (isotropic uniform random chords) of a convex body in Rn with its volume and surface is extended to the case of nonconvex bodies in the framework…
Invariance properties of bacterial random walks in complex structures
- MathematicsNature Communications
- 2019
It is shown that while external shape and internal disorder have dramatic effects on the distributions of path lengths and residence times, the corresponding mean values are constrained by the sole free surface to perimeter ratio, and bacteria escape faster from structures with higher density of obstacles due to the lower accessible surface.
Cauchy formulas for linear transport in random media
- MathematicsEPL (Europhysics Letters)
- 2019
In the context of linear transport in homogeneous non-stochastic media, the well-known Cauchy formulas express a remarkably elegant relation between the contributions to the angular flux within an…
Collision densities and mean residence times for d-dimensional exponential flights.
- MathematicsPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2011
A general framework for d-dimensional setups is introduced and it is emphasized that exponential flights represent a deceivingly simple system, where in most cases closed-form formulas can hardly be obtained.
Properties of branching exponential flights in bounded domains
- Mathematics
- 2012
In a series of recent works, important results have been reported concerning the statistical properties of exponential flights evolving in bounded domains, a widely adopted model for finite-speed…
Chord length distributions and small-angle scattering
- Mathematics
- 2000
Abstract: Chord length distributions describe size, shape and spatial arrangement of geometrical objects (particles). The chord length distribution is in principle proportional to the second…
Averaged residence times of stochastic motions in bounded domains
- Physics
- 2005
Two years ago, Blanco and Fournier (Blanco S. and Fournier R., Europhys. Lett. 61 (2003) 168) calculated the mean first exit time of a domain of a particle undergoing a randomly reoriented ballistic…